| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 183 |
3.4%
|
| -7 | The establishment does not use water for production | 310 |
5.7%
|
| 1 | Yes | 77 |
1.4%
|
| 2 | No | 4847 |
89.5%
|
| Sysmiss | 3959 |